वायरलेस वीडियो ट्रांसमिशन आरएफ फ्रीक्वेंसी डिजिटल डाउन कनवर्टर सीओएफडीएम ट्रांसफर फ्रीक्वेंसी 2.4जी से 600 मेगाहर्ट्ज कम बीडीसी

Digital Down Converter

Wireless Video Transmission RF Frequency Digital Down Converter COFDM Transfer frequency 2.4G to 600Mhz low

विक्रय बिंदु

1. Input frequencies from 24000 to 600MHz (Lower 1800Mhz)
2. उच्च बैंडविड्थ
3. Low phase noise
4. High-frequency stability

विशिष्टता

RF Frequency Range: 2400 मेगाहर्टज
IF Frequency Range: 600 मेगाहर्टज
वापसी हानि:-12 डीबी
Frequency Accuracy: ±10 ppm
छवि अस्वीकृति: 60 डीबीसी
समतलता: ±0.5 dB (8मेगाहर्ट्ज बैंडविड्थ)
Conversion Gain: 25 डीबी
Phase Noise (डीबीसी/हर्ट्ज)
dBc/Hz@1KHz ≤-80
dBc/Hz@10KHz ≤-90
dBc/Hz@100KHz ≤-100
Supply Voltage: 10~15V
Power Current: 100 एमए
Operating Temperature Range: +25 ℃

पत्तन

RF IN: SMA-50K
IF OUT: SMA-50K
Power +12V: Stick
जी.एन.डी: Soldering lug

टिप्पणी

1. The converter does not need to add a low-noise amplifier at the back end.
2. Actual Test: closed-loop test under the frequency of 2.4GHz/bandwidth 4MHz, the receiving sensitivity can reach -105dBm.
3. Input frequency supports 1~3GHz. (We can help customize).
4. Output frequency supports 300~700MHz. (We can support customize).

About the above video:

Our most popular products are wireless video transmitters and receivers. तथापि, some clients require modification of the transmission frequency to meet local legal demand, in which case the digital frequency up-down converter block comes in handy. One customer requested that we customize the RF frequency down converter for his 2.4G wireless video transmitter. So the input frequency is 2.4GHz, the output frequency is 600MHz, and the lowdown frequency is 1800MHz. We created the sample in accordance with his specifications. So I showed him a simple video that showed the 2.4G transmitter and 600Mhz receiver working correctly. If you have a similar requirement, such as 1-3G frequency input and 300-700Mhz output, please contact us for a custom solution.

1. What is an RF frequency digital block-down converter (बीडीसी)?

A RF frequency block downconverter (बीडीसी) for wireless video transmitters is a device that can convert a high frequency range to a low frequency range.

Typically used on the wireless video transmitter side. उदाहरण के लिए,

• From 5.8G to 2.4G down converter
• From 2.4G to 1.2G down converter
• From 1.2G to 600Mhz down converter

This is due to the fact that wireless transmission frequencies in many countries or regions are restricted by local laws and regulations.

It is not permitted to use in a specific frequency range.

To change the operating frequency of the transmitter and receiver, down-conversion or up-conversion is required. Make sure the transmission frequency is in accordance with local laws and regulations.

There is also the case where the professional receiving frequency is fixed, उदाहरण के लिए, between 300-800Mhz.

In order for the transmitter's frequency to be paired, the frequency of the 1.2G transmitter must be reduced.

All of this necessitates the use of a frequency downconverter for wireless video transmission.

2. My input frequency range would need to be 2.0Ghz to 2.7Ghz, need a downconverter to 200 Mhz to 900Mhz. The conversion gain would ideally be 30db not 25db. Would this be easy for you to do?

हाँ, our professional engineer replied, we can do it. And, before delivery, we will show you the test video.

3. Can you make a down converter with LO1G? we need input 1300-1400 Mhz frequency and output 300-400 मेगाहर्टज.

हाँ, our professional engineer confirms that we can re-design and modify some key components to do that. ज़रूर, before delivery, we will show you the test video.

4. Do you have or designed for MMDS applications? From 3400 -3600मेगाहर्टज, The S-Band is converted to the UHF range 400 सेवा मेरे 600 मेगाहर्ट्ज, LO oscillator is 3000MHZ.

Thanks for your inquiry, I will check with our engineer.

5. What is RF output in dB? Can you make a down converter from 5.8 गीगाहर्ट्ज़ से 3.1 गीगा? Can you make a UP converter? From 1,25 गीगाहर्ट्ज़ से 3.4 गीगा?

Thanks for your inquiry. हम आपके लिए अनुकूलित कर सकते हैं.

Please tell us the specification details of your transmitter and receiver modules.

6. Would you customize the frequency up-converter block and frequency down-converter block?

सवाल: हम n.1 डाउन कनवर्टर में रुचि रखते हैं 950-1500 मेगाहर्ट्ज से 350-850 मेगाहर्ट्ज और n.1 अपकनवर्टर से 350-850 मेगाहर्ट्ज से 950-1500 मेगाहर्टज. स्थानीय थरथरानवाला 1800 मेगाहर्टज.

हाँ, Here is our specification for your references.

Frequency Down Converer Block specification sheet

वस्तु	विशिष्टता
इनपुट आवृत्ति	950 MHz ～1550 MHz
आउटपुट आवृत्ति	350 MHz ～850 MHz
स्थानीय आवृत्ति	1800 मेगाहर्ट्ज
SPAN	500मेगाहर्ट्ज
शोर चित्र	≤1.5dB
पाना	25 डीबी
वाहक रिसाव	≤-20dBm
Belt unevenness(8मेगाहर्ट्ज)	≤1.5dB
आईपी3:	≥15dBm
अधिकतम इनपुट स्तर	-10dBm
वीएसडब्ल्यूआर	≤1.5
संचालन तापमान	-10～+60℃
वोल्टेज करंट	12V/240mA
आरएफ इंटरफ़ेस	SMA-50KFD
आकार	108*48*15मिमी
बिजली आपूर्ति मोड	सॉकेट बिजली की आपूर्ति

Frequency Up Converer Block specification sheet

वस्तु	विशिष्टता
इनपुट आवृत्ति	350 MHz ～850 MHz
आउटपुट आवृत्ति	950 MHz ～1550 MHz
स्थानीय आवृत्ति	1800 मेगाहर्ट्ज
SPAN	500मेगाहर्ट्ज
शोर चित्र	≤1.5dB
पाना	25 डीबी
वाहक रिसाव	≤-20dBm
Belt unevenness(8मेगाहर्ट्ज)	≤1.5dB
आईपी3:	≥15dBm
अधिकतम इनपुट स्तर	-10dBm
वीएसडब्ल्यूआर	≤1.5
संचालन तापमान	-10～+60℃
वोल्टेज करंट	12V/240mA
आरएफ इंटरफ़ेस	SMA-50KFD
आकार	108*48*15मिमी
बिजली आपूर्ति मोड	सॉकेट बिजली की आपूर्ति

सवाल: If a signal of -25 dbm enter, what level has the coverterd output?

उत्तर: 0 dBm

7. I’m searching for a specific down converter, हमारे अपने ओएफडीएम आरएफ लिंक के साथ उपयोग किया जाएगा.

मैं एक विशिष्ट डाउन कनवर्टर की खोज कर रहा हूं, हमारे अपने ओएफडीएम आरएफ लिंक के साथ उपयोग किया जाएगा:

50ओम आरएफ इनपुट: 1.435 सेवा मेरे 1.525 गीगा

75 ओम IF output: कोई भी आवृत्ति बैंड, 100 मेगाहर्ट्ज और 900 मेगाहर्ट्ज के बीच

पसंदीदा एलओ आवृत्ति: 1846मेगाहर्ट्ज

कम लाभ: लगभग 28dB

उच्चतम लाभ: लगभग 43dB

डीसी IF आउटपुट पोर्ट से संचालित, 12-24वीडीसी रेंज

हाँ, we can customize it for you.

8. Can you make a frequency up convert from 1.0-2.5 गीगाहर्ट्ज़ से 5.8 गीगा?

We can not make a frequency up convert from 1.0-2.5 गीगाहर्ट्ज़ से 5.8 गीगा.

But we can produce the frequency up convert from 1.0-2.5 GHz to 4.3G~5.8 GHz. Every input frequency add 3.3G (3300मेगाहर्टज) to output frequency.

What is DDC

In digital signal processing, a digital down-converter (DDC) converts a digitized, band-limited signal to a lower frequency signal at a lower sampling rate in order to simplify the subsequent radio stages. The process preserves all the information in the original signal less that which is lost to rounding errors in the mathematical processes. The input and output signals can be real or complex samples. Often the DDC converts from the raw radio frequency or intermediate frequency down to a complex baseband signal.

वास्तुकला

A DDC consists of three subcomponents: a direct digital synthesizer (DDS), a low-pass filter (एलपीएफ), and a down sampler (which may be integrated into the low-pass filter). The DDS generates a complex sinusoid at the intermediate frequency (अगर). Multiplication of the intermediate frequency with the input signal creates images centered at the sum and difference frequency (which follows from the frequency-shifting properties of the Fourier transform). The low-pass filters pass the difference (i.e. baseband) frequency while rejecting the sum frequency image, resulting in a complex baseband representation of the original signal. Assuming a judicious choice of IF and LPF bandwidth, the complex baseband signal is mathematically equivalent to the original signal. In its new form, it can readily be down-sampled and is more convenient to many DSP algorithms. Any suitable low-pass filter can be used including FIR, IIR, and CIC filters. The most common choice is an FIR filter for low amounts of decimation (less than ten) or a CIC filter followed by an FIR filter for larger down-sampling ratios.

Variations on the DDC

Several variations on the DDC are helpful, including many that input a feedback signal into the DDS. These include:

1. Decision-directed carrier recovery phase-locked loops in which the I and Q are compared to the nearest ideal constellation point of a PSK signal, and the resulting error signal is filtered and fed back into the DDS
2. A Costas loop in which the I and Q are multiplied and low pass filtered as part of a BPSK/QPSK carrier recovery loop

Implementation
DDCs are most commonly implemented in logic in field-programmable gate arrays or application-specific integrated circuits. While software implementations are also possible, operations in the DDS, multipliers, and input stages of the low-pass filters all run at the sampling rate of the input data. This data is commonly taken directly from analog to digital converters (ADCs) sampling at tens or hundreds of MHz. CORDIC is an alternative to the use of multipliers in the implementation of digital down converters.

Here is a client’s customized project, 1300~1400 Mhz input down converter to 300-400Mhz.

图传下变频器中国深圳供应商， 频率定制

名称: 图传下变频器
型号: LWDC-248258I
编号: 1805001
RF +12V IF
नाम: आरएफ डाउन कनवर्टर
नमूना: LWDC-3000I
नमूना: LWDC-1400
Frequency input 2G~2.7G(2000~2700Mhz)
निचला: 1800मेगाहर्टज
Frequency output: 200Mhz-700Mhz
SN2405002

Customize Frequency Specification Sheet Download

OF 1750Mhz Down